Samsung 40T 21700 battery

What is Samsung 40T 21700 battery?

The Samsung 40T 21700 is a premium rechargeable lithium-ion battery engineered for high-drain devices. With a nominal capacity of 4000mAh and a nominal voltage of 3.6V, it offers superior energy density in the 21700 form factor. Built by Samsung SDI, this battery is designed for users who require sustained power output and extended usage between charges, especially in demanding applications like advanced vaping devices.

Key features

• High Capacity — 4000mAh provides extended runtime over standard 18650 batteries.
• 35A Continuous Discharge — supports high-wattage and sub-ohm vaping safely.
• 21700 Form Factor — modern design with improved efficiency and power delivery.
• Lithium-ion Chemistry — reliable performance with stable voltage output.
• Safety-Engineered — includes protection against over-discharge, short circuits, and thermal runaway.
• 4.2V Max Voltage — compatible with standard 21700 charging protocols.
• Discharge Cutoff at 2.5V — preserves battery life and prevents damage.

Who is Samsung 40T 21700 battery for?

This battery is ideal for experienced vapers using high-performance mods that require stable, high-current power sources. It's also suitable for other high-drain devices like flashlights or portable tools. Users seeking longer sessions without frequent recharging will benefit most from its high capacity and robust output.

How does Samsung 40T 21700 battery compare?

Compared to older 18650 batteries, the Samsung 40T 21700 offers greater capacity and improved efficiency due to its larger size and modern chemistry. It outperforms many mid-tier 21700 cells in both discharge rating and longevity. While pricier than basic cells, its reliability and performance make it a top choice among genuine Samsung-branded batteries for power-intensive applications.